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L. Hv PARKER.

SPRAY NOZZLE.

APPLICATION man MAR. 1, 1919.

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UNITED STATES PATENT OFFICE.

LEE H. PARKER, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO SPRAY ENGINEERING COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

SPRAY-NOZZLE.

Specification of Letters Patent.

Patented July 8, 1919.

Original application iiled December 1, 1917, Serial No. 204,962. Divided and this application filed March 1, 1919. Serial No. 280,048.

To all whom it may concern:

Be it known that 1, LEE H. PARKER, a citizen of the United States, and a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented an Improvement in Spray-Nozzles, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawingsrepresenting like parts. I

This application is a division of my copending application Serial No. 204,962, filed December 1, 1917.

This invention relates to spray nozzles of general application and may be used for distributing liquids containing more or less solid matter.

\Vhile my invention is not restricted to such use, an important object thereof is to provide a nozzle for cooling water in or in connection with cooling ponds or for condensers, ice plants, mills or any industry requiring a supply of cooling water or liquid.

By the nozzle herein described I form and distribute over preferably an extended area a spray composed of or comprising water or other liquid or suitable fluid, and in accordance with the disclosed and preferred embodiment of my invention, I discharge the liquid in a spray that is of substantially uni: form homogeneity throughout. Such a spray may be used in any of the defined relations or for any other suitable purpose, as, for example, for spraying efiluent, for precipitating or for spraying coal dust or other foreign matter, for air washing, for condensing vapors, for humidifying air and for other purposes. In carrying out my invention, I project the fluid in a flaring spray, and within the nozzle I preferably simultaneously produce an inner jet and one or more surrounding jets which are preferably and for the best results mixed within the mixing chamber, so that there is effective mixture or blending of the jets before they issue in spray form from the mixing chamber, which latter may be and preferably is so shaped or is provided with means whereby to cause' impact and mixing of the several jets within the confined space of the mixing chamber of the nozzle.

In order that the principle of the invention may be readily undclstood, I have in the accompanying drawing disclosed a single type of nozzle embodying my invention and wherein- Figure 1 is a vertical, central section of such nozzle;

Fig. 2 is a view upon the line 2-2 of Fig. 1 looking downward or with the cap portion of the nozzle removed; and

Fig. 3 is a transverse section upon the line 33 of Fig. 1.

Referring more particularly to the drawing, the nozzle herein shown comprises a shell or casing 1, the lower end of which is adapted to be attached to a hose or pipe for conveying the water or other liquid. To that end, I have herein represented said shell or casing 1 as threaded at its lower end at 2. Preferably also the upper end of the shell or casing 1 is threaded as represented at 3 for the reception of the head or cap 4 of the nozzle, which is interiorly threaded. My invention is, however, not limited to a nozzle wherein the parts 1 and 4 are separate or detachable, since they might be formed in a single piece. Preferably, for conveniencein manufacture, the members 1 and 4 are detachable.

. The head or cap 4 is provided with a suitable discharge orifice 5 herein represented as circular. The interior of the head or cap 4 constitutes a mixing chamber, and it may be and preferably is tapering or more or less dome shaped, so that the streams of liquid are caused to mix and inter-mingle prior to their discharge from the outlet 5. In the patent to Eneas, No. 1,101,264, dated June 23, 1914, there is disclosed a spray nozzle having a central, axially arranged sleeve or tube through which the central or axial jet passes, surrounding spiral or inclined vanes being provided to convey a plurality of streams of liquid in spiral directions, all of the streams being caused to meet and intermingle within the mixing chamber.

It is the purpose of my invention to provide means for supplying liquid interiorly of the surrounding and preferably spiral or inclined jet or jets, and I have for this purpose herein represented a single inner passage for providing an inner jet, at least a portion of such passage being eccentric to the longitudinal axis of the nozzle. The surrounding jet or jets may be of any suitable character. Preferably the surrounding jet or the plurality of surrounding jets, if

employed, are formed by reason of the provision of spirals or inclined formatlons which may be of any suitable character. I do not provide a tube or sleeve for the inner jet but omit the physical tube or sleeve or other element defining the circumferential boundary of the inner jet or stream, which, as above stated, is eccentrically located throughout at least a portion of its extent with respect to the longitudinal axis of the nozzle.

Preferably I obtain the inner jet or stream by positioning or forming the vanes or spirals or other elements by which the surrounding jet or jets are formed in such manner as to permit the passage of the inner jet. In the disclosed embodiment of my invention, I have accomplished this result by inwardly terminating the vane or vanes at suitable distances radially from the axis of the nozzle, so as to leave an unobstructed non-axial passage through which the liquid passes in a straight stream. I may, however, form or shape or position the vane or vanes in any equivalent way permitting the liquid to pass non-axially between them and non-axially within the convolutions of the vane, if a single vane only be employed. In accomplishing the result in this particular form of the invention I provide a plurality of spirals or inclined vanes 6 of any suitable pitch and of any suitable radial extent. I have herein represented said spirals as cast or otherwise formed within the shell or casing 1, but Within the scope and purpose of my invention, they may be separately formed and attached thereto in any suitable manner or positioned frictionally or otherwise within the nozzle. Preferably the said spirals or inclined vanes terminate at or below the upper end of the shell or casing 1; that is, at or below the base of the .mixing chamber, so that the liquid is discharged from the upper ends of the spirals or inclined vanes directly against the inner wall 7 of tl mixing chamber, and in such a mann r that the stream or streams, which are outwardly thrown under centrifugal force, are guided by the inner surface 7- across the discharge opening 5 where or below which they meet the herein disclosed inner jet, indicated at 8, with the result that all the jets are thoroughly mixed or intermingled within the mixing chamber, and so that they issue therefrom in a flaring spray of substantial] uniform homogeneity in cross section. Pre

erablyeach of the spirals or inclined vanes 6 at its lower end merges into the inner surface 9 of the shell or casing 1, as indicated, and at the upper end each of said spirals or vanes again merges into the inner wall of the shell or casing, as indicated at 11, thus presenting as little obstruction as possible to the spiral or inclined streams,

particularly at the lower end thereof. In other words, the spiral or spirals or inclined vanes 6 taper toward or are of gradually decreasing width at the points where they merge into the upper surface of the shell 9. Within the broad scope and purpose of my invention, however, they may be of full Width at both their upper and their lower ends or of any suitable intermediate widths. I may employ my invention in the spraying of sewage which contains more or less solid matter, and I may and preferably insuch case so construct the spiral or spirals that they present the least resistancetd the flow of the material while preserving the flow of material in a single stream and herein an inner noncentral jet.

While the liquid or other suitable material that is to be delivered through the nozzle within the surrounding or spiral jet or jets may be caused to flow in any suit-- able manner, I have herein represented means for providing for the flow of the liquid or other material in a singleinner stream, and as shown most clearly in Figs. 1 and 3, I have provided means whereby at least the ortion of the flow that is nearest the inta e end of the nozzle is located at one side of or eccentric-ally of the longitudinal axis of the nozzle. To this end, I have in said Figs. 1 and 3, represented the vane or vanes 6 as so formed as to provide an opening or pasage 12 whereby liquid enterin the nozzle is conducted to one side of the Iongitudinal axis of the nozzle, and after passing through the opening 12, in this embodiment of my invention, is permitted or caused, before entering the mixing chamber 8, to become substantially axial. This I have accomplished, in this embodiment of my invent in, by providing a substantially axial passage or opening 13 prior to or as herein indicated at the point Where the liquid enters the mixing chamber.

Desirably and in the disclosed embodiment of my invention, the diameter of the inner opening 12 herein shown is at least substantially one third the diameter of the vane or vanes 6, and it is also substantially equal to the full diameter of the outlet 5 from the nozzle. This permits the ready use of the nozzle with a liquid containing solid matter, such as sewage. The dimensions which I have given are illustrative merely, and. it is clearly to be understood that my invention is in no sense limited thereto as the dimensions of parts may be such as to provide in any equivalent manner for the onward flow of liquid substantially parallel to but eccentric to the longitudinalaxis of the nozzle.

In order further to decrease the obstruction presented by the spirals or vanes 6, the inner edge 12' thereof is made rounding in cross section, as clearly indicated in Fig. 1.

Preferably each of the vanes. or spirals is made of a decreasing pitch, so that the surrounding jet or jets are brought gradually from a flow in the direction of the entering stream to a flow in a direction at approximately right angles to the stream flow and approximately tangential thereto. Thus, the surrounding jet or jets are with the least possible obstruction brought into a direction of flow so as thoroughly to mix and intermingle with the inner stream. The inner flow, by which I mean the flow of material otherwise than along and as directly caused by the vanes or spirals 6, is preferably straight, though Within the scope and purpose of my inventiomflit may be rotatory in whole or in part. The cylindrical surface of the inner flow may have more or less of a rotatory motion which may be caused in part by the effect of the surrounding jet or jets which are not separated from the inner flow by a physical wall. The outer or surroundin; jet or jets partake of their described paths, particularly through centrifugal action, but the inner flow is not under the influence of centrifugal action and maintains a substantially straight course into the mixing chamber 8.

in th said mixing chamber, the inner flow meets the surrourulmg jet or jets, and thus the liquid or fluid of the jets is mixed or blended within. a confined chamber or space. The mixed mass issues from the chamber in a spray which is of substantially uniform homogeneity throughout. VJhile the several jets or streamsare mixed ithin the mixing chamber 7 substantially asset forth in the said patent to l lneas, No. 1,1013%, 1 have found in practice that the described provision of me i: r eii'ecting the formation of an inner not. and one or more surrounding jets peculiarly cooperates with the mixing chamber, and particularly in that the liquid from all the jets enters with a minimum of obstruction into the mixing chamber and in streams oi such unimpeded force as to result in an even, more effective mixing than before. Moreover l find that in some cases there is or may be a preliminary mixing at the very base of and Within the mixing chamber, that is, at substantially the point where the several streams enter thereinto. This is owing to the fact that no physical Wall is present so as accurately or exactly to define the shape or radial extent of the inner flow. Within the scope and purpose of my invention, themixing chambernced not be employed, althoughit preferably and for th best results is employed.

Referring to the disclosed type only of my invention, 1 point out that the inner How is herein illustrated as a jet that is in the direction of the longitudinal axis of the nozzle and throughout a ortlon of its length is eccentric to the said longitudinal axis; that is, it is herein shown as non-axial, particularly at a portion thereof between t 1e mixing chamber and the liquid eutranceend of the nozzle. In the present embodiment of my invention, the vane or vanes 6 are so shaped that only throughout a ortion of the length of the inner How does the liquid pass axially, thus forming a central jet. Still referring to the disclosed embodiment of my invention the remainder of the length of the )assage or space wherethrough passes the liquid forming the inner flow is non-axial. In the disclosed embodiment of my invention, at the upper portion of the inner flow, the course of the liquid is substantially central or axial of the passage.

Again referring to the disclosed embodiment of the invention, I have herein so constructed the nozzle that the liquid does not, immediately where it enters the nozzle, par take of a central stream character, but it does .do so before the mixing chamber is reached.

his depends upon the shape and position and constructimi of the vane or vanes.

Referring to that portion of the nozzle Where the eccentrically located opening 12 is provided, it will be apparent that thehpoi tion 1d of the vane 6 adjacent thereto cen stitutes in effect a central plug or obstruction of restricted length, and at a suitable pointwhercubove the liquid partakes of the central stream character, to which feature, however, my invention is not limited.

In other words, I have at 14; indicated a central or axial obstruction, and the opening l2 is at one side thereof. Such opening is preferably of the same diameter as the exitpassage 5.

While my invention is in no sense Whatever limited to such proportioning of the parts, it is pointed out that for the best results and particularly where the nozzle is used in the spraying of sewage or in the spraying of liquid containing moreor less solid matter, the inner formation providing for the inner flow is approximately one third of the diameter of the'enti're pamagc through the nozzle.

The surrounding or outerjet or jets may be of any suitable character. While I preferably use a spiral vane or vanes, such as indicated at 6, it is clear that the vane or vanes need not be of spiral character, so long as it or they are substantially a surrounding or outer vane or vanes, so as to produce an outer or surrounding jet or jets.

The formation or structure of the nozzle interiorly of the shell 1 constitutes a core mainly made up of vanes or spirals 6 and also including the prolongation or lateral formation of one of the vanes 6 indicated at 14 in Fig. 1, and which constitutes an obstructing formation shielding, the outlet of the nozzle from the direct projection or travel of an axial portion of the initial stream of liquid through the nozzle. The construction is such that there is permitted an onward projection or travel laterally of the axis of the nozzle of liquid admitted at the inlet of the nozzle axially of said nozzle.

It will be noted that the core includes the formation of a vane or vanes, a central obstructing formation, and also a. formation permitting the forward projection or travel of a portion of the liquid stream as clearly shown at 12 in Fig. 3.

The formation 14 is positioned across the axis of the nozzle, and at 12 is the liquid passage or opening, which, as clearly shown in Fig. 3, is theresult of a vane-edge shape or formation of the vane or vanes, such pas= sage or opening being laterally oflset from the axis of the nozzle. This opening or passage resulting from said vane-edge formation permits forward projection or travel of a portion of the liquidstream. This passage or opening resulting from the vane-edgeformation modifies the flow of liquid along the vane wherein it is formed. That Is to say, it modifies the rate of spiral advancement. imparted to a portion of the liquid along said vane. The said passage or opening resulting from said vane-edge formation causes a part of the initial liquid stream to exert liquid pressure directly longltudinally of the nozzle, and thereby accelerates the rate of spiral advancement of a portion of such initial stream. The core construction is such as to impart a plurality of different, movements to different portions of the "initial stream. The core formation is such as to cause difi'erent portions of a single and 'imperforate stream of liquid to impact upon each other and upon the interior of' the housing of the nozzle, so as to convert the liquid stream into a spray of substantially uniform consistency. The said core formation includes a spiral or helical passage and 'an opening laterally offset from the axis of the nozzle.

, I have heretofore pointed out that the spirals 6 are represented as cast or otherwise formed within the shell or casing 1, but that 1 within the scope and purpose of the invention, they may be separately formed and attached thereto in any suitable manner or positioned frictlonally or otherwise within the nozzle. Such removability permits the cleaning upon removal of the core.

It will be observed that the vane-edge shape or formation resulting in the opening 12 affords the equivalent of a bore extending through the nozzle core in a direction-substantially parallel with the axis of the nozzle.

Having thus described one illustrative embodiment of my invention, I desire it to be understood that although specific terms are employed, they are used in a generic and descriptive sense and not for purposes of jection or travel of a stream, said housing having a spray produclimitation the scope of the invention being set forth in the following claims.

Claims:

1. .A spray nozzle having a housing with an inlet and an outlet, and means within the housing for imparting spirally advancing motion to parts of a liquid stream, with means shielding the outlet from the direct projection or travel of an axial portion of the initial stream of liquid therethrough but permitting onward projection or travel, laterally-of the axis of the nozzle, of liquid admitted at the inlet of the nozzle axially thereof, the nozzle being devoid of a physical wall separating the spirally advancing parts of the liquid stream from the remainder thereof.

2. A spray nozzle having a housing with an inlet and an outlet and one or more vanes within the housing for imparting spirally advancing motion to parts of a liquid stream, together with a formation integral with said yane or vanes, for preventing the direct proection or travel of an axial portion of the initial stream of liquid therethrough, but

permitting onward projection or travel, laterally of the axis of the nozzle, of liquid admitted at the inlet of the nozzle axially thereof, the nozzle being devoid of a physical Wall separating the spirally advancing 3. A spray nozzle having a housing with an inlet and an outlet and one or more vanes within the housing for imparting spirally advancing motion to parts of a liquid stream, there being an opening laterally offset from the axis of the nozzle, for the forward projection or travel of a portion of the liquid stream, the nozzle being devoid of a physical wall separating the spirally advancing parts of the liquid stream from the remain: der thereof. I

4. A spray nozzle having a'housing with an inlet and an outletand a vane within the housing for imparting spirally advancing motion to a part of a liquid stream, said vane having a liquid passage laterally ofi'set'from the axis of the nozzle, for the forward proportion of the liquid ing chamber in advance of said vane, the nozzle being devoid of a physical Wall separatlng the spirally advancing parts of the liquid stream from the remainder thereof.

5. A spray nozzle having a housing with an lnlet and an outlet and a vane within the housing for imparting spirally advancing motion to a part of a liquid stream, said vanehaving a vane-edge shape or formation providing a passage laterally offset from the axis of the nozzle for the forward pro ection or travel of a portion of the liquid stream, said housing having a mixing chamber in advance of said vane and from which the liquid is discharged through said outlet as a spray of substantially uniform homogeneity throughout.

6. A spray nozzle with inlet and outlet and having a vane equipped with a vaneedge shape or formation laterally offset from the axis of the nozzle and providing a passage for liquid toward said outlet and modifying the flow of liquid along said vane.

7. In a nozzle, a spiral vane having its inner edge equipped With a vane-edge shape or formation laterally of the axis of the nozzle for modifying the rate of spiral advancement imparted to a portion ofthe liquid along the vane.

8. In a nozzle, a spiral vane having its inner edge equipped with a vane-edge shape or formation laterally offset from the axis of said nozzle, and acting to modify the rate of spiral advancement imparted to a portion of the liquid along said vane.

9. In a liquid manipulating appliance, means tending to produce an initial stream developing a spirally advancing jet, and means laterally oHset from the longitudinal axis of the nozzle for causing a part of said stream to exert liquid pressure directed longitudinally of the nozzle and thereby accelerating the rate of spiral advancen'ient of a portion of this stream, the nozzle being devoid of a physical wall separating the spirally advancing jet of the liquid stream from the remaining part of said stream.

10. In a spray nozzle, a casing contracted at one end into a tapering spray-producing chamber having a forward outlet smaller than the rear end of the said chamber, and a core mounted in the casing behind the said chamber, the said core having a portion shielding the outlet from the direct projection or travel of an axial portion of the initial stream therethrough, said core having a formation for imparting\ a plurality of different movements to different portions of the said initial stream, and for uniting the said portions of liquid into a singleunitary stream at the forward end of the core, the nozzle being devoid of a physical wall separating the said several portions of the said initial stream.

11. In a spray nozzle. a casing contracted at one end into a tapering spray-producing chamber having a forward outlet smaller than the rear end of the said chamber, and a core mounted in the casing behind the said chamber, the said core having a portion extending across the longitudinal axis of the nozzle and shielding the said outlet from portions of liquid into a single unitary stream at the forward end of the core, the nozzle being devoid of a physical wall separating the said several portions of the .said initial stream.

12. In a spray nozzle, a plurality of helical vanes disposed for producing rotary jets advancing spirally at a given rate, and means laterally offset from the longitudinal axis of said nozzle for altering the rate of spiral advancement of a portion of said rotary jets, said helical vanes having free inner edges, thereby avoiding the formation of an inner physical wall.

13. In a nozzle, a core having as one element thereof an obstructing formation coaxial with the nozzle and as another element thereof, a vane disposed in substantially helical shape, one of said elements being shaped, for modifying the rate of spiral advancement imparted to the liquid by the vane, said helical vane having a free inner edge, thereby avoiding the formation of an inner hysical Wall.

14. n a nozzle, a core having as one element thereof of an obstructing formation coaxial with the nozzle and as another element thereof, a vane disposed in substantially helical shape, one of said elements being shaped laterally offset from the longitudinal axis of the nozzle for the passage of a portion of the initial liquid stream, said helical vane having a free inner edge, thereby avoiding the formation of an inner physical Wall.

15. A spray nozzle having a housing provided with an inlet and an outlet, and a core Within the housing having a vane or vanes affording a passage or passages and having a central obstrgucting formation integral with said vane or vanes and also having an opening inside the outer radial limits of said vane or vanes to permit the onward projection or travel of a part of the liquid entering at said inlet, there being no physicall wall separating said opening from the passage or passages afforded by said vane or vanes.

16. A spray nozzle having a housing provided with an inlet, and an outlet, a core within the housing having a vane or vanes affording a passage or passages and having a central obstructing formation, and a mixing chamber in advance of said core and from which the liquid is discharged through said outlet, and also having an opening inside the outer radial limits of said vane or vanes to permit the onward projection 01 travel of a part of the liquid entering at said inlet, there being no physical wall separating said opening from the passage or passages afforded by said vane or vanes.

17. A spray nozzle having a housing provided with an 1nlet and an outlet, a core w1th1n the houslng havlng a vane or vanes affording a passage or, passages and having 18. A spray nozzle having a housing pro-- vided with an inletand an outlet, 2. core within the housing having a vane or vanes afi'ording a passage or passages and havinga central obstructing formation, said core also having a formation permitting the forward projection or travel of a portion of the liquid stream, there being no physical Wall between said formation permitting said forward projection and the passage on passages afforded by said vane or vanes, and a mixing chamber in advance of said core and from which the liquid is discharged through said outlet.

19. A spray nozzle having a housing provided with an inlet and an outlet, a core within the housing having a vane or vanes affording a passage or passages, and having a central obstructing formation, said cone also having a formation permitting the forward projection or travel of a portion of the liquid stream, there being no physical Wall between said formation permitting said forward projection and the passage or passages afforded by said vane or vanes, and means in advance of said core cooperating to cause the liquid to issue from the nozzle in a spray of substantially uniform homogeneity.

20. Av nozzle having a housing with an inlet and an outlet for a liquid stream and a core within said housing, said core having formations causing different portions of a single and imperforate stream of liquid devoid of physical separating walls to impact upon each other and upon the interior of said housing, and all said portions to travel forward in paths that are non-axial of the nozzle to'convert said liquid stream into a spray of substantially uniformconsistency.

21. A nozzle having a. housing with an inlet and an outlet for a liquid stream, and a core Within said housing, said core having formations causing diiferent portions of a single and imperforate stream of liquid to impact upon each other and uponthe interior of said housing to convert said liquid stream into a spra of substantially uniform consistency, inclu ing a spiral passage and an opening laterally offset from the axis of the nozzle, the nozzle being devoid of a hysical wall separating the spiral passage rom said laterally ofi'set opening.

22. A spray nozzle having a housing with an inlet and an outlet and a vane Within the housing for imparting spirally advancing motion to a part of a liquid stream, said vane having a vane-edge-shape or formation providing a liquid passage laterally offset from the axis of the nozzle, for the forward projection or travel of a portion of the liquid stream.

23. A spray nozzle having a housing with an inlet and an outlet and a vane within the housing for imparting spirally advancing motion to a part of a liquid stream, said vane having at an inner edge a shape or formation providing a liquid passage laterally oii'set from the axis of thenozzle, for the forward projection or travel of a portion of the liquid stream. i

24. A spray nozzle having'a housing with an inlet and an outlet and a vane within the housing for imparting spirally advancing motion to a part of a liquid stream, said Vane having an edge thereof provided with a shape or formation providing a liquid passage laterally offset from the axis of the nozzle for the forward projection or travel of a portion of the liquid stream, said housing having a mixing chamber in advance of said vane and from which the liquid is dis chargedthrough said outlet as a spray of substantially uniform homogeneity throughout.

25. A spray nozzle having a housing with an inlet and an outlet and a vane within the housing for imparting spirally advancing motion to a part of a liquid stream, said vane having an edge thereof provided with nozzle, for the forward projection or travel of a portion of the liquid stream, said lionsing having a spray producing chamber in advance of said vane.

26. In a liquid-manipulating nozzle, means tending to produce an initial stream developing a spirally advancing jet, and means for causing a part of said stream to exert liquid pressure directed longitudinally of the nozzle but non-axially of said nozzle and thereby accelerating the rate of spiral advancement of a portion of this stream.

27. A spray nozzle having a housing provided with an inlet and an outlet, a core within the housing having a vane or vanes affording a passage or passages and having a central obstructing formation at the same height or zone in the nozzle as that of a portion of the vane or vanes which is of the full width of such vane or varies and a forpassages afiorded by said vane or vanes, and

means in advance of said core cooperating to cause the liquid to issue from the nozzle in a spray of substantially uniform homogeneity.

28. A nozzle comprising a casing, a vane or vanes therein to impose a spirally advancing motion upon a part of the stream entering the nozzle, the vane having an edge formation laterally of the axis of the nozzle to modify the flow of said part of the stream and to oo-act in effecting the discharge of the stream in a spray that is substantially uniform or homogeneous.

25). A spray nozzle having a housing with an inlet and an outlet, and means Within the housing for imparting a spi ally advancing motion to parts of a liquid stream, said means having a formation providing for forward, non-spiral passage of a part of the liquid stream laterally of the axis of the nozzle, and to mingle with the first mentioned part of the liquid stream but devoid of physical separating wall and to co-act in effecting the discharge of the stream in a spray that is of substantially uniform homogeneity.

30. A spray nozzle having a housing with an inlet and an outlet, and means within the housing for imparting a spirally advancing motion to parts of a liquid stream, said means having a formation providing for forward, non-spiral passage of a part of the liquid stream laterally of the axis of the nozzle, and to mingle with the first Inentioned part of the liquid stream but devoid of physical separating wall and to co-aet in effecting the discharge of the stream in a spray that is of substantially uniform homogeneity, the nozzle having a mixing chamber in advance of said vane or vanes and which cooperates in effecting the discharge of the spray in a substantially uniform or homogeneous condition.

31. A nozzle comprising a casing, a vane or vanes therein to impose a spirally advancing motion to a part of the stream entering the nozzle, the vane having a formation laterally of the axis of the nozzle to modify the flow of said part of the stream but devoid of )hysioal separating wall and to co-aet in e ecting the discharge of the stream in a spray that is substantially uniform or homogeneous, the nozzle having a mixing chamber in advance of said vane or vanes and which cooperates in effecting the discharge of the spray in a substantially uniform or homogeneous condition.

32. A nozzle comprising a casing, a vane or vanestherein to impose a spirally advancing motion upon a part of the stream entering the nozzle, the vane having a formation laterally of the'axis of the nozzle to modify the flow of thesaid part of the stream and to co-act in effecting the discharge of the stream in a spray that is substantially uniform or homogeneous, the nozzle being devoid of a physical wall separating the spirally advancing part of the stream from the remainder thereof.

33. A spray nozzle having a housing with an inlet and an outlet and a core within the housing having a vane or vanes and also having a vane-edge formation laterally of the axis of the nozzle providing in effect a bore extending along the nozzle core in a direction substantially parallel to the axis of the core.

34. A spray nozzle having a housing with an inlet and an outlet and a core within the housing having a vane or vanes and also having a vane-edge formation laterally of the axis of the nozzle providing in effect a bore extending along the nozzle core in a direction substantially parallel to the axis of the core. the nozzle having a n'iixing chamber in advance of said core.

35. A spray nozzle having a housing provided with an inlet and an outlet, and a core within the housing having a plurality of vanes imparting a spirally advancing mo tion to a part of the liquid stream entering the nozzle, the core having a vane-edge formation laterally of the axis of the nozzle providing in effect a bore permitting the for ard passage of a portion of the liquid stream in a direction substantially parallel to the axis of the core, the nozzle having a mixing chamber in advance of the core in which the several parts of the stream are mixed and from which mixing chamber they issue in a spray of substantially uniform homogeneity.

36. A spray nozzle comprisinga casing and a core within the casing cooperating with the latter for initially imparting spi rally advancing motion to parts of a liquid stream, said ore having a formation laterally of the axis of the core for altering the motion of a portion of each of said parts, thereby causing these to blend into an imperforate stream subject to a variety of different strains, there being no physical n all between the spirally advancing parts of the liquid stream and the remainder thereo 37. In a liquid manipulating nozzle, means tending to produce from an original stream a spirally advancing jet, and means laterally of the axis of the nozzle for causing a part of the original stream to exert liquid pressure directly longitudinally of the nozzle, and thereby accelerating the rate of spiral advancement of a portion of such jet.

:38. A spray nozzle having a housing provided with an inlet and an outlet. 21 core within the housing having a vane or vanes and having a central obstructing formation integralwith said vane or vanes, said core having an edge formation of at least one of its vanes laterally of the axis of the core, permitting forward m vement of a part of the liquid stream laterally of the axis of the core, said nozzle having a mixing chamber in advance of the core wherein the several parts of the liquid stream meet and from which the liquid issues in. a spray of substantially uniform homogeneity.

39. A spray nozzle having a housing with an inlet and an outlet and a vane within the housing for imparting spirally advancing motion to a part of a liquid stream, said vane having a vane-edge shape or formation providing a passage laterally ofiset from the axis of the nozzle for the forward projection 01' travel of a portion of the liquid stream.

40. A nozzle comprising a casing, a vane or vanes therein to impose a spirally advancing motion upon a part of the stream entering the nozzle, and having a formation laterally of the axis of the nozzle to modify the flow of said part of the stream and to coact in afi'ecting the discharge of the stream in a spray that is substantially uniform or homogeneous, there being no forward projecting physical Wall between said formation and the passage or passages afforded by said vane or vanes.

In testimony whereof, I have signed my name to this specification.

LEE H. PARKER. 

